package com.incar.chuxing.utils.zxing.encode;

import android.graphics.Bitmap;
import android.util.Base64;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;

public class CodeCreator {

    /**
     * 生成QRCode（二维码）
     *
     * @param url
     * @return
     * @throws WriterException
     */
    public static Bitmap createQRCode(String url) throws WriterException {

        if (url == null || url.equals("")) {
            return null;
        }

        //先用Base64编码.处理中文乱码乱码问题
        byte[] datas = url.getBytes();
        byte[] encode = Base64.encode(datas, Base64.DEFAULT);
        url = new String(encode);

        // 生成二维矩阵,编码时指定大小,不要生成了图片以后再进行缩放,这样会模糊导致识别失败
        BitMatrix matrix = new MultiFormatWriter().encode(url,
                BarcodeFormat.QR_CODE, 300, 300);

        int width = matrix.getWidth();
        int height = matrix.getHeight();

        // 二维矩阵转为一维像素数组,也就是一直横着排了
        int[] pixels = new int[width * height];

        for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
                if (matrix.get(x, y)) {
                    pixels[y * width + x] = 0xff000000;
                }
            }
        }

        Bitmap bitmap = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        bitmap.setPixels(pixels, 0, width, 0, 0, width, height);
        return bitmap;
    }

}
